Base64 Encoder / Decoder

Base64 encoder & decoder — free local

Encode or decode Base64 strings and small files in your browser. Handy for data URLs, tokens, and debugging without a server round-trip.

Use the tool

Full tool — runs in your browser. No sign-up required.

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Is Base64 secure storage for secrets?

No. Base64 is encoding only and is trivial to reverse; use proper encryption or a secret manager.

Does encoding upload my data?

No. Standard Base64 encode/decode runs entirely in your browser.